The National Weather Service issued a winter storm warning for southern Iowa counties throughout Saturday evening after forecasters predicted an additional 2 to 5 inches of snow in the area.

The heaviest snowfall totals came out of southwestern Iowa, where as much as a foot of snow fell near Corning. As of midday Saturday, around 2 to 4 inches of snow had fallen throughout the Des Moines metro area, and south-central Iowa counties received around 5 inches of snow.

Lighter accumulations of snow were reported in north-central Iowa, with Story and Boone counties receiving around 1 to 2 inches of snow as of early Saturday afternoon.

Weather officials cautioned that drivers should slow down and allow extra time for travel, as roads could still be slippery in some spots. Visibility could be reduced to a half-mile throughout the afternoon.

ROAD CONDITIONS IMPROVINGPlows have really gotten a handle on things across SW Iowa. Roads have improved greatly there, and across southern Iowa as well over the past hour. Still quite a few partially covered roadways in that area, and 100% covered SE pic.twitter.com/SXLOsWiKd8

Sgt. Paul Parizek, with the Des Moines Police Department, said nine of those crashes were hit-and-runs, and there was one minor injury. One crash involved an OWI, and the others caused property damage.

Authorities had issued more than 200 snow ordinance parking citations as of late Saturday morning.

The snow system was expected to exit the state late Saturday afternoon and into the evening. Winds are expected to remain relatively light, and blowing snow shouldn't be an issue.

Saturday night will be considerably cloudy, with lows in the lower 20s and winds northeast at 5 to 10 mph.

Sunday and the beginning of the workweek will be partly cloudy, with highs in the 30s.